package cn.lbwfree.web.filter;

import cn.lbwfree.web.entity.Reader;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;


@WebFilter(filterName = "ReaderFilter", urlPatterns = "/book")
public class ReaderFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpSession session = ((HttpServletRequest)req).getSession();
        Reader reader = (Reader) session.getAttribute("reader");
        if(reader == null){
            ((HttpServletResponse)resp).sendRedirect("login.jsp");
        }else{
            chain.doFilter(req, resp);
        }
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
